Is vacuum having any temperature.?

In summary, the conversation discusses the concept of virtual particles and their potential impact on the temperature of a vacuum. The question is raised about whether a perfect vacuum without any virtual particles would have a temperature of zero. The idea of "virtual temperature" is also brought up, which refers to the average energy content of the vacuum expressed as if it were a gas in a box. It is suggested that this could be related to the cosmological constant and could potentially be below absolute zero. Ultimately, the conclusion is that there could still be a small amount of energy in the vacuum, resulting in a temperature just slightly above absolute zero.
  • #1
aditya23456
114
0
if vacuum has virtual particles it should have temperature right.? If a perfect vacuum exists ie without any virtual particles..whats temperature of this .is it zero.?
 
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  • #2
Virtual temperature. What would be the meaning of that? The average energy content of the vacuum expressed as if it is a gas in a box? That looks like the cosmological constant (some 6e-9 Joule/m3) as being the amount seemingly to escape from that virtual box of radiation gas. If it is balanced that would be the temperature on the outside as well.
 
  • #3
I don't mention virtual temperature anyway...did u conclude that temperature of vacuum to be zero Kelvin.?
 
  • #4
Temperature is propotional to the average kinetic energy of an idealized mon-atomic gas. So if in space there is some energy, there will be some temperature. Just a few nano Kelvin above absolute zero.
If talking about virtual particles with properties like inverse time travel, negative mass or what ever is needed to get the dimensions right for the result to make sense, I do not see any sensible way of assigning a real (as opposed to the imaginary part) value to something completely imaginary/virtual. That virtual temperature could be well below the absolute 0 temperature
 

1. Is the vacuum of space cold?

No, the vacuum of space does not have a specific temperature. Temperature is a measurement of the average kinetic energy of particles, and since there are very few particles in a vacuum, there is no temperature.

2. Can objects in a vacuum have a temperature?

Yes, objects in a vacuum can have a temperature. Temperature is a property of matter, and even though a vacuum has very little matter, objects placed in a vacuum can still have a temperature.

3. What is the temperature of a perfect vacuum?

A perfect vacuum, which has absolutely no matter, does not have a temperature. Temperature is a property of matter, and without matter, there can be no temperature.

4. Why is space considered to be near absolute zero temperature?

Space is not considered to be near absolute zero temperature. In fact, the temperature of space can vary greatly depending on the location and the presence of matter. However, areas of space that are far from any stars or planets can have extremely low temperatures due to the lack of heat sources.

5. Can a vacuum have a negative temperature?

No, a vacuum cannot have a negative temperature. Temperature is a measure of the average kinetic energy of particles, and since there are very few particles in a vacuum, there is no way for the average kinetic energy to be negative.

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